I have very excitable children; four of them. And last night, after watching Hair Spray for the fifth time, my very excitable son dashed towards the kitchen when “dinner!” was yelled. Unfortunately, he didn’t make it that far. He smacked headfirst (I assume) into the giant blue yoga ball that the kids left in the TV room and landed knee-first (I assume) onto the tile floor. I’m making these assumptions because I was lying in bed, having already eaten my …